When searching in Summon, use the filter book/ebook or start your search here (already limited to books and ebooks):
Keywords are natural language terms that you think describe your topic and typically words used to search in Summon or Google. Results may include some irrelevant content.
Subject terms are selected words pre-defined by a database and are used to describe the content of each item within that database. Results are typically very relevant to your topic.
Here are some useful subject terms in the catalogue that can be built on to locate resources: